diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.18/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.18/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.18/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch b/target/linux/brcm63xx/patches-3.18/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch new file mode 100644 index 0000000..404bea9 --- /dev/null +++ b/target/linux/brcm63xx/patches-3.18/206-USB-EHCI-allow-limiting-ports-for-ehci-platform.patch @@ -0,0 +1,66 @@ +From 6ac09efa8f0e189ffe7dd7b0889289de56ee44cc Mon Sep 17 00:00:00 2001 +From: Jonas Gorski <jogo@openwrt.org> +Date: Sun, 19 Jan 2014 12:18:03 +0100 +Subject: [PATCH] USB: EHCI: allow limiting ports for ehci-platform + +In the same way as the ohci platform driver allows limiting ports, +enable the same for ehci. This prevents a mismatch in the available +ports between ehci/ohci on USB 2.0 controllers. + +This is needed if the USB host controller always reports the maximum +number of ports regardless of the number of available ports (because +one might be set to be usb device). + +Signed-off-by: Jonas Gorski <jogo@openwrt.org> +--- + drivers/usb/host/ehci-hcd.c | 4 ++++ + drivers/usb/host/ehci-platform.c | 2 ++ + drivers/usb/host/ehci.h | 1 + + include/linux/usb/ehci_pdriver.h | 1 + + 4 files changed, 8 insertions(+) + +--- a/drivers/usb/host/ehci-hcd.c ++++ b/drivers/usb/host/ehci-hcd.c +@@ -660,6 +660,10 @@ int ehci_setup(struct usb_hcd *hcd) + + /* cache this readonly data; minimize chip reads */ + ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); ++ if (ehci->num_ports) { ++ ehci->hcs_params &= ~0xf; /* bits 3:0, ports on HC */ ++ ehci->hcs_params |= ehci->num_ports; ++ } + + ehci->sbrn = HCD_USB2; + +--- a/drivers/usb/host/ehci-platform.c ++++ b/drivers/usb/host/ehci-platform.c +@@ -58,6 +58,9 @@ static int ehci_platform_reset(struct us + hcd->has_tt = pdata->has_tt; + ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug; + ++ if (pdata->num_ports && pdata->num_ports <= 15) ++ ehci->num_ports = pdata->num_ports; ++ + if (pdata->pre_setup) { + retval = pdata->pre_setup(hcd); + if (retval < 0) +--- a/drivers/usb/host/ehci.h ++++ b/drivers/usb/host/ehci.h +@@ -213,6 +213,7 @@ struct ehci_hcd { /* one per controlle + u32 command; + + /* SILICON QUIRKS */ ++ unsigned int num_ports; + unsigned no_selective_suspend:1; + unsigned has_fsl_port_bug:1; /* FreeScale */ + unsigned big_endian_mmio:1; +--- a/include/linux/usb/ehci_pdriver.h ++++ b/include/linux/usb/ehci_pdriver.h +@@ -40,6 +40,7 @@ struct usb_hcd; + */ + struct usb_ehci_pdata { + int caps_offset; ++ unsigned int num_ports; + unsigned has_tt:1; + unsigned has_synopsys_hc_bug:1; + unsigned big_endian_desc:1; |